Desk lamp



FIG. 1 is a front perspective view of a desk lamp showing my new design;

FIG. 2 is a front elevational view thereof on an enlarged scale;

FIG. 3 is a left side elevational view thereof on an enlarged scale;

FIG. 4 is a top plan view thereof on an enlarged scale; and

FIG. 5 is a bottom perspective view thereof on an enlarged scale.

The broken lines are shown for illustrative purposes only. The supporting rods are broken away for convenience of illustration. 

The ornamental design for a desk lamp, as shown and described. 